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dc.contributor.author
Ivanova, Natalia  
dc.contributor.author
Starov, Victor  
dc.contributor.author
Rubio, Ramon  
dc.contributor.author
Ritacco, Hernán Alejandro  
dc.contributor.author
Hilal, Nidal  
dc.contributor.author
Johnson, Daniel  
dc.date.available
2019-01-08T16:07:18Z  
dc.date.issued
2010-02  
dc.identifier.citation
Ivanova, Natalia; Starov, Victor; Rubio, Ramon; Ritacco, Hernán Alejandro; Hilal, Nidal; et al.; Critical wetting concentrations of trisiloxane surfactants; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 354; 1-3; 2-2010; 143-148  
dc.identifier.issn
0927-7757  
dc.identifier.uri
http://hdl.handle.net/11336/67655  
dc.description.abstract
Trisiloxane surfactants also known as "superspreaders" are characterized by a critical wetting concentration (CWC) which has been determined by Svitova et al [T. Svitova, R.M. Hill, Y. Smirnova, A. Stuermer, G. Yakubov, Langmuir 14 (1998) 5023-5031]. CWC is a concentration above which a transition from partial wetting to complete wetting occurs at spreading over moderately hydrophobic surfaces, hence, the CWC is associated with the beginning of the superspreading. The latter shows that the knowledge of the CWCs is important for many wetting/spreading applications. We suggest a new method, which allows determining CWCs for a range of trisiloxanes using wetting behaviour of aqueous trisiloxane solutions on highly hydrophobic smooth Teflon AF coated silicon wafers. Using the new method the CWCs for trisiloxane surfactants, Tn with a wide range in the number (n = 4-9) of ethylene oxide units have been measured. The critical aggregation concentration (CAC) for trisiloxane surfactants has been measured using the surface tension methods. Additionally, spreading kinetics of all trisiloxane surfactants studied over moderately hydrophobic substrates has been investigated. It has been found that for all trisiloxanes studied the CWCs are several times higher than their corresponding CAC values. The CWCs for T6 and T8 trisiloxanes obtained according to our approach are in agreement with those measured by Svitova et al. [T. Svitova, R.M. Hill, Y. Smirnova, A. Stuermer, G. Yakubov, Langmuir 14 (1998) 5023-5031] for the case of complete wetting. It has been verified that indeed at CWCs estimated according to our approach trisiloxane surfactant solutions demonstrate superspreading behaviour on moderately hydrophobic surfaces with the exception of trisiloxane T4, which still shows only partial wetting. Thus, the CWC does not depend on the degree of hydrophobicity of substrates and could be considered as a distinct property of surfactants that characterize the highest limit of their spreading capability. Crown Copyright © 2009.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Critical Wetting Concentration  
dc.subject
Spreading  
dc.subject
Trisiloxane  
dc.subject.classification
Otras Ciencias Químicas  
dc.subject.classification
Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Critical wetting concentrations of trisiloxane surfactants  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-01-02T18:23:20Z  
dc.journal.volume
354  
dc.journal.number
1-3  
dc.journal.pagination
143-148  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Ivanova, Natalia. University Of Loughborough; Reino Unido  
dc.description.fil
Fil: Starov, Victor. University Of Loughborough; Reino Unido  
dc.description.fil
Fil: Rubio, Ramon. Universidad Complutense de Madrid; España  
dc.description.fil
Fil: Ritacco, Hernán Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Complutense de Madrid; España  
dc.description.fil
Fil: Hilal, Nidal. The University of Nottingham; Reino Unido  
dc.description.fil
Fil: Johnson, Daniel. The University of Nottingham; Reino Unido  
dc.journal.title
Colloids and Surfaces A: Physicochemical and Engineering Aspects  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S092777570900449X  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.colsurfa.2009.07.030